Here's a 3D model of the 6-Tube clock. The file might take a long time to load.
If the loading is finished but nothing appears, just drag with the mouse inside the 3D model window.
[vrm360 canvas_name=s2 model_url=https://wizeus.de/wp-content/uploads/2021/06/Nixie_Tube_Clock_KiCAD_Rev3.wrl aspect_ratio=1.33333 hide_cmds=all]